Final answer:
LC or Least Count on a Vernier Caliper refers to the smallest measurable quantity the instrument can indicate, representing the minimum measurement increment discernible.
Step-by-step explanation:
LC or Least Count in the context of a Vernier Caliper refers to the smallest measurable quantity that the instrument can reliably indicate. The term 'Least Count' accurately represents the minimum measurement increment that the vernier caliper can discern. It is the difference between the value of one main scale division and the value of one vernier scale division. When measuring with a vernier caliper or similar instruments, the smallest digit marked is considered, and an additional digit smaller than the minimum marked digit (estimated digit) is added to the reported value. For instance, a measurement reported as 17.7 cm would mean that '17' is the smallest digit marked on the ruler, and '0.7' is an estimated digit. Conventionally, this measured value would have an error range, often represented as ± (plus or minus), to indicate the uncertainty.